/*! HTML5 Boilerplate v8.0.0 | MIT License | https://html5boilerplate.com/ */

/* main.css 2.1.0 | MIT License | https://github.com/h5bp/main.css#readme */
/*
 * What follows is the result of much research on cross-browser styling.
 * Credit left inline and big thanks to Nicolas Gallagher, Jonathan Neal,
 * Kroc Camen, and the H5BP dev community and team.
 */

/* ==========================================================================
   Base styles: opinionated defaults
   ========================================================================== */

html {
  color: #222;
  font-size: 1em;
  line-height: 1.4;
}

/*
 * Remove text-shadow in selection highlight:
 * https://twitter.com/miketaylr/status/12228805301
 *
 * Vendor-prefixed and regular ::selection selectors cannot be combined:
 * https://stackoverflow.com/a/16982510/7133471
 *
 * Customize the background color to match your design.
 */

::-moz-selection {
  background: #b3d4fc;
  text-shadow: none;
}

::selection {
  background: #b3d4fc;
  text-shadow: none;
}

/*
 * A better looking default horizontal rule
 */

hr {
  display: block;
  height: 1px;
  border: 0;
  border-top: 1px solid #ccc;
  margin: 1em 0;
  padding: 0;
}

/*
 * Remove the gap between audio, canvas, iframes,
 * images, videos and the bottom of their containers:
 * https://github.com/h5bp/html5-boilerplate/issues/440
 */

audio,
canvas,
iframe,
img,
svg,
video {
  vertical-align: middle;
}

/*
 * Remove default fieldset styles.
 */

fieldset {
  border: 0;
  margin: 0;
  padding: 0;
}

/*
 * Allow only vertical resizing of textareas.
 */

textarea {
  resize: vertical;
}

/* ==========================================================================
   Author's custom styles
   ========================================================================== */

/**
 * Smooth scrolling on the whole document
 */
html {
	scroll-behavior: smooth;
}

@media screen and (prefers-reduced-motion: reduce) {
	html {
		scroll-behavior: auto;
	}
}

body {
    font-family: 'Droid Sans Fallback', 'Roboto', sans-serif;
    -webkit-font-smoothing: antialiased;
    -webkit-text-stroke-width: 0.2px;
    -moz-osx-font-smoothing: grayscale;
}

body ul {
  padding-inline-start: 0;
}

header {
    background: linear-gradient(to left, #28a5f5, #1e87f0);
    color: white;
    padding: 0 2em;
    position: fixed;
    left: 0;
    top: 0;
    width: calc(100% - 4em);
    width: --webkit-calc(100% - 4em);
    z-index: 999;
}

header nav {
  overflow: auto;
}

header ul {
    display: flex;
    list-style-type: none;
    align-items: center;
    margin: 0;
}

header li:first-child {
    font-size: 1.5em;
    margin-right: auto;
}

header a {
    display: block;
    color: white;
    text-decoration: none;
}

header a.list-item {
    font-size: 0.75em;
    text-transform: uppercase;
    padding: 2.5em;
    position: relative;
}

header a.list-item::after {
  position: absolute;
  content: "";
  left: 2em;
  bottom: 1em;
  width: 0;
  height: 1px;
  background: white;
  transition: width 0.3s ease-in-out 0s;
}

header a.list-item:hover::after {
    width: calc(100% - 4em);
    width: --wetkit-calc(100% - 4em);
}

div.sticky {
  height: 5.75em;
}

main {
    display: flex;
}

main hr {
  margin-right: 2em;
}

main h1 {
    font-size: 2em;
    font-weight: normal;
}

main h2 {
    font-size: 1.75em;
    font-weight: lighter;
}

main h3 {
    font-size: 1.5em;
    font-weight: lighter;
    color: dodgerblue;
}

main p {
  color: #666;
}

aside.left {
    width: 19.1%;
    padding: 0em 2em;
}

article {
    width: 61.8%;
    padding: 0 4em;
}

article p {
  text-align:justify;
}

article a {
  text-decoration: none;
}

article hr {
  margin-top: 2em;
  margin-bottom: 2em;
  margin-right: auto;
}

article section.content a::before {
  content: "#";
  position: absolute;
  width: 25px;
  margin-left: -25px;
  color: #999;
}

aside.right {
    width: 19.1%;
    padding: 0 2em;
    position: relative;
}

aside.right nav {
  position: fixed;
  min-width: 128px;
}

.anchor {
    padding-top: 100px;
    margin-top: -100px;
}

ul.nav li {
    list-style-type: none;
}

ul.nav li:first-child > p {
    text-transform: uppercase;
}

ul.nav a {
    display: block;
    text-decoration: none;
    padding: 0.5em 0;
    color:lightskyblue ;
    position: relative;
    transition: color 0.5s ease-in-out;
}

ul.nav a:hover {
  color:dodgerblue;
}

ul.nav li.active a {
  color:dodgerblue ;
}

ul.nav li.active > a::before {
    content: "";
    position: absolute;
    top: 1.25em;
    left: -1.5em;
    width: 1em;
    border-top: 1px solid #1e87f0;
}

.content {
  margin-bottom: 2em;
}

.content code {
  font-family: 'Source Code Pro', monospace;
}

/* ==========================================================================
   Helper classes
   ========================================================================== */

/*
 * Hide visually and from screen readers
 */

.hidden,
[hidden] {
  display: none !important;
}

/*
 * Hide only visually, but have it available for screen readers:
 * https://snook.ca/archives/html_and_css/hiding-content-for-accessibility
 *
 * 1. For long content, line feeds are not interpreted as spaces and small width
 *    causes content to wrap 1 word per line:
 *    https://medium.com/@jessebeach/beware-smushed-off-screen-accessible-text-5952a4c2cbfe
 */

.sr-only {
  border: 0;
  clip: rect(0, 0, 0, 0);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  white-space: nowrap;
  width: 1px;
  /* 1 */
}

/*
 * Extends the .sr-only class to allow the element
 * to be focusable when navigated to via the keyboard:
 * https://www.drupal.org/node/897638
 */

.sr-only.focusable:active,
.sr-only.focusable:focus {
  clip: auto;
  height: auto;
  margin: 0;
  overflow: visible;
  position: static;
  white-space: inherit;
  width: auto;
}

/*
 * Hide visually and from screen readers, but maintain layout
 */

.invisible {
  visibility: hidden;
}

/*
 * Clearfix: contain floats
 *
 * For modern browsers
 * 1. The space content is one way to avoid an Opera bug when the
 *    `contenteditable` attribute is included anywhere else in the document.
 *    Otherwise it causes space to appear at the top and bottom of elements
 *    that receive the `clearfix` class.
 * 2. The use of `table` rather than `block` is only necessary if using
 *    `:before` to contain the top-margins of child elements.
 */

.clearfix::before,
.clearfix::after {
  content: " ";
  display: table;
}

.clearfix::after {
  clear: both;
}

/* ==========================================================================
   EXAMPLE Media Queries for Responsive Design.
   These examples override the primary ('mobile first') styles.
   Modify as content requires.
   ========================================================================== */

@media only screen and (min-width: 35em) {
  /* Style adjustments for viewports that meet the condition */
}

@media print,
  (-webkit-min-device-pixel-ratio: 1.25),
  (min-resolution: 1.25dppx),
  (min-resolution: 120dpi) {
  /* Style adjustments for high resolution devices */
}

/* ==========================================================================
   Print styles.
   Inlined to avoid the additional HTTP request:
   https://www.phpied.com/delay-loading-your-print-css/
   ========================================================================== */

@media print {
  *,
  *::before,
  *::after {
    background: #fff !important;
    color: #000 !important;
    /* Black prints faster */
    box-shadow: none !important;
    text-shadow: none !important;
  }

  a,
  a:visited {
    text-decoration: underline;
  }

  a[href]::after {
    content: " (" attr(href) ")";
  }

  abbr[title]::after {
    content: " (" attr(title) ")";
  }

  /*
   * Don't show links that are fragment identifiers,
   * or use the `javascript:` pseudo protocol
   */
  a[href^="#"]::after,
  a[href^="javascript:"]::after {
    content: "";
  }

  pre {
    white-space: pre-wrap !important;
  }

  pre,
  blockquote {
    border: 1px solid #999;
    page-break-inside: avoid;
  }

  /*
   * Printing Tables:
   * https://web.archive.org/web/20180815150934/http://css-discuss.incutio.com/wiki/Printing_Tables
   */
  thead {
    display: table-header-group;
  }

  tr,
  img {
    page-break-inside: avoid;
  }

  p,
  h2,
  h3 {
    orphans: 3;
    widows: 3;
  }

  h2,
  h3 {
    page-break-after: avoid;
  }
}

